2-FORMYLTHIOPHENE 2-Thienaldehyde 2-Thienylaldehyde 2-Thienylcarboxaldehyde 2-Thiophenealdehyde 2-Thiophenecarboxaldehyde 98-03-3 AI3-16611 EINECS 202-629-8 NSC 2162 Thiophene-2-carbaldehyde alpha-Formylthiophene alpha-Thiophenecarboxaldehyde